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/* -*- c++ -*- */
/*
* Copyright © 2010-2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef BRW_IR_ALLOCATOR_H
#define BRW_IR_ALLOCATOR_H
#include "main/macros.h"
namespace brw {
/**
* Simple allocator used to keep track of virtual GRFs.
*/
class simple_allocator {
public:
simple_allocator() :
sizes(NULL), offsets(NULL), count(0), total_size(0), capacity(0)
{
}
~simple_allocator()
{
free(offsets);
free(sizes);
}
unsigned
allocate(unsigned size)
{
if (capacity <= count) {
capacity = MAX2(16, capacity * 2);
sizes = (unsigned *)realloc(sizes, capacity * sizeof(unsigned));
offsets = (unsigned *)realloc(offsets, capacity * sizeof(unsigned));
}
sizes[count] = size;
offsets[count] = total_size;
total_size += size;
return count++;
}
/**
* Array of sizes for each allocation. The allocation unit is up to the
* back-end, but it's expected to be one scalar value in the FS back-end
* and one vec4 in the VEC4 back-end.
*/
unsigned *sizes;
/**
* Array of offsets from the start of the VGRF space in allocation
* units.
*/
unsigned *offsets;
/** Total number of VGRFs allocated. */
unsigned count;
/** Cumulative size in allocation units. */
unsigned total_size;
private:
unsigned capacity;
};
}
#endif
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